In Gracilaria, sexual reproduction is

Options

A. Isogamous
B. Anisogamous
C. Oogamous
D. Both (1) & (2)

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question is about Gracilaria, which is a type of red algae.

2. **Classify the Algae**: Gracilaria belongs to the class Rhodophyceae, which is known for red algae.

3. **Understand Reproductive Methods**: Gracilaria reproduces both asexually and sexually. Asexual reproduction occurs through fragmentation, while sexual reproduction involves gametes.

4. **Define Sexual Reproduction Types**: In the context of sexual reproduction, there are two types mentioned: isogamous and oogamous.
- **Isogamous**: This type involves gametes that are of the same size and shape.
- **Oogamous**: This type involves the fusion of a large non-motile gamete (egg) and a smaller motile gamete (sperm).

5. **Determine the Type of Sexual Reproduction in Gracilaria**: In Gracilaria, the sexual reproduction is classified as oogamous because it involves the fusion of a large non-motile egg and a motile sperm.

6. **Conclusion**: Therefore, the correct answer to the question is that in Gracilaria, sexual reproduction is oogamous.

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